Tyler Page

Dr. Stanley C. Tyler

Associate Research Faculty
Atmospheric Science, Biogeochemistry

Dept. of Earth System Science
202 Physical Sciences Research Facility
University of California
Irvine, CA 92717-3100
Telephone: (714) 824-2685 (office); (714) 824-3271 (laboratory); (714) 824-8794 (department)
FAX: (714) 824-3256
Internet: styler@uci.edu

Stan Tyler received his B.A. degree in chemistry and physics from UC Irvine in 1975, his M.S. in Physics from UCLA in 1975, and his Ph.D. in chemistry from UC Irvine in 1983. Before joining the UC Irvine faculty he was a postdoctoral fellow (2 years) and staff scientist (8 years) at the National Center for Atmospheric Research in Boulder, Colorado from 1983 to 1993. His work is sponsored by the USDA, CalSpace Institute, and Lawrence Livermore National Laboratory.

RESEARCH INTERESTS

Studies of global budgets and biospheric-atmospheric interactions involving trace gas species CH4, CO, CO2, and N2O. Studies focus on sources, sinks, and source/sink distributions of these gases and the chemistry related to their formation and destruction. Key investigative tools include measurements of stable isotope ratios (13C/12C, D/H, 15N/14N, and 18O/16O) in these compounds and their precursors as well as measurements of their radiocarbon content, concentrations, fluxes, and distributions.

One current study is of atmospheric CH4, where our research group has a long-term data record of CH4 from Niwot Ridge, Colorado, a mid-continental site representing well-mixed background air. Measurements include mixing ratio, delta-13C , delta-D , and 14C content of CH4. The data are interpreted by comparison to measurements reported at other sites and through the use of atmospheric models.

A second research project measures CH4 and CO2 from emissions and in pore water and sediments from rice paddies in Texas and Japan. The measurements are used to detemined biogeochemical factors controlling production, oxidation, and release of CH4 in rice paddies, and to establish the relationship between agricultural practices, CH4 emissions, and atmospheric CH4.

PUBLICATIONS

Tyler, S. C., P. Zimmerman, C. Cumberbatch, J. Greenberg, C. Westberg and Johanna P. E. C. Darlington. Measurements and interpretation of delta-13C of methane from termites, rice paddies, and wetlands in Kenya, Global Biogeochemical Cycles, 2, 341-355, (1988).

Tyler, S. C., D. C. Lowe, E. Dlugokencky, P. R. Zimmerman and R. J. Cicerone. Methane and carbon monoxide emissions from asphalt pavement: Measurements and estimates of their importance to global budgets, J. Geophys. Res., 95, 14007-14014, (1990).

Tyler, S. C. The global methane budget. "Microbial Production and Consumption of Radiatively Important Trace Gases: Methane, Nitrogen Oxides, and Halomethanes", J. E. Rogers and W. B. Whitman, Eds., American Society for Microbiology, pp. 7-38, (1991).

Lowe, D. C., C. A. M. Brenninkmeijer, S. C. Tyler, and E. J. Dlugokencky. A method for the determination of the isotopic composition of atmospheric methane and its application in the Antarctic. J. Geophys. Res., 96, 15455-15467, (1991).

Tyler, S. C. Kinetic isotope effects and their use in studying atmospheric trace species: Case study, CH4 + OH. "Isotope Effects in Gas-Phase Chemistry", J. Kaye, Ed., American Chemical Society Symposium Series No. 502, pp. 390-408, (1992).

Tyler, S. C. Rice paddy methane and its role in the atmospheric methane budget: what isotopes of carbon and hydrogen can tell us. "CH4 and N2O: Global Emissions and Controls from Rice Fields and Other Agricultural and Industrial Sources", K. Minami, A. Mosier, and R. Sass, Eds., NIAES Series 2, Symposium Volume of National Institute of Agro-Environmental Sciences, Tsukuba, Japan, pp. 117-134, (1994).